import cv2
import numpy as np

img = cv2.imread('statue_small.jpg')

mask = np.zeros(img.shape, np.uint8)
mask[120:180, :, :] = 255
mask[:, 80:180, :] = 255
img_new = cv2.bitwise_and(img, mask)
cv2.imshow('img', img)
cv2.imshow('mask', mask)
cv2.imshow('img_new', img_new)

cv2.waitKey()
cv2.destroyAllWindows()
